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1{-# LANGUAGE CPP #-}
2-- |
3-- Module : Data.Packed.Internal.Common
4-- Copyright : (c) Alberto Ruiz 2007
5-- License : BSD3
6-- Maintainer : Alberto Ruiz
7-- Stability : provisional
8--
9--
10-- Development utilities.
11--
12
13
14module Data.Packed.Internal.Common(
15 Adapt,
16 app1, app2, app3, app4,
17 app5, app6, app7, app8, app9, app10,
18 (//), check, mbCatch,
19 splitEvery, common, compatdim,
20 fi,
21 table,
22 finit
23) where
24
25import Control.Monad(when)
26import Foreign.C.Types
27import Foreign.Storable.Complex()
28import Data.List(transpose,intersperse)
29import Control.Exception as E
30
31-- | @splitEvery 3 [1..9] == [[1,2,3],[4,5,6],[7,8,9]]@
32splitEvery :: Int -> [a] -> [[a]]
33splitEvery _ [] = []
34splitEvery k l = take k l : splitEvery k (drop k l)
35
36-- | obtains the common value of a property of a list
37common :: (Eq a) => (b->a) -> [b] -> Maybe a
38common f = commonval . map f where
39 commonval :: (Eq a) => [a] -> Maybe a
40 commonval [] = Nothing
41 commonval [a] = Just a
42 commonval (a:b:xs) = if a==b then commonval (b:xs) else Nothing
43
44-- | common value with \"adaptable\" 1
45compatdim :: [Int] -> Maybe Int
46compatdim [] = Nothing
47compatdim [a] = Just a
48compatdim (a:b:xs)
49 | a==b = compatdim (b:xs)
50 | a==1 = compatdim (b:xs)
51 | b==1 = compatdim (a:xs)
52 | otherwise = Nothing
53
54-- | Formatting tool
55table :: String -> [[String]] -> String
56table sep as = unlines . map unwords' $ transpose mtp where
57 mt = transpose as
58 longs = map (maximum . map length) mt
59 mtp = zipWith (\a b -> map (pad a) b) longs mt
60 pad n str = replicate (n - length str) ' ' ++ str
61 unwords' = concat . intersperse sep
62
63-- | postfix function application (@flip ($)@)
64(//) :: x -> (x -> y) -> y
65infixl 0 //
66(//) = flip ($)
67
68-- | specialized fromIntegral
69fi :: Int -> CInt
70fi = fromIntegral
71
72-- hmm..
73ww2 w1 o1 w2 o2 f = w1 o1 $ w2 o2 . f
74ww3 w1 o1 w2 o2 w3 o3 f = w1 o1 $ ww2 w2 o2 w3 o3 . f
75ww4 w1 o1 w2 o2 w3 o3 w4 o4 f = w1 o1 $ ww3 w2 o2 w3 o3 w4 o4 . f
76ww5 w1 o1 w2 o2 w3 o3 w4 o4 w5 o5 f = w1 o1 $ ww4 w2 o2 w3 o3 w4 o4 w5 o5 . f
77ww6 w1 o1 w2 o2 w3 o3 w4 o4 w5 o5 w6 o6 f = w1 o1 $ ww5 w2 o2 w3 o3 w4 o4 w5 o5 w6 o6 . f
78ww7 w1 o1 w2 o2 w3 o3 w4 o4 w5 o5 w6 o6 w7 o7 f = w1 o1 $ ww6 w2 o2 w3 o3 w4 o4 w5 o5 w6 o6 w7 o7 . f
79ww8 w1 o1 w2 o2 w3 o3 w4 o4 w5 o5 w6 o6 w7 o7 w8 o8 f = w1 o1 $ ww7 w2 o2 w3 o3 w4 o4 w5 o5 w6 o6 w7 o7 w8 o8 . f
80ww9 w1 o1 w2 o2 w3 o3 w4 o4 w5 o5 w6 o6 w7 o7 w8 o8 w9 o9 f = w1 o1 $ ww8 w2 o2 w3 o3 w4 o4 w5 o5 w6 o6 w7 o7 w8 o8 w9 o9 . f
81ww10 w1 o1 w2 o2 w3 o3 w4 o4 w5 o5 w6 o6 w7 o7 w8 o8 w9 o9 w10 o10 f = w1 o1 $ ww9 w2 o2 w3 o3 w4 o4 w5 o5 w6 o6 w7 o7 w8 o8 w9 o9 w10 o10 . f
82
83type Adapt f t r = t -> ((f -> r) -> IO()) -> IO()
84
85type Adapt1 f t1 = Adapt f t1 (IO CInt) -> t1 -> String -> IO()
86type Adapt2 f t1 r1 t2 = Adapt f t1 r1 -> t1 -> Adapt1 r1 t2
87type Adapt3 f t1 r1 t2 r2 t3 = Adapt f t1 r1 -> t1 -> Adapt2 r1 t2 r2 t3
88type Adapt4 f t1 r1 t2 r2 t3 r3 t4 = Adapt f t1 r1 -> t1 -> Adapt3 r1 t2 r2 t3 r3 t4
89type Adapt5 f t1 r1 t2 r2 t3 r3 t4 r4 t5 = Adapt f t1 r1 -> t1 -> Adapt4 r1 t2 r2 t3 r3 t4 r4 t5
90type Adapt6 f t1 r1 t2 r2 t3 r3 t4 r4 t5 r5 t6 = Adapt f t1 r1 -> t1 -> Adapt5 r1 t2 r2 t3 r3 t4 r4 t5 r5 t6
91type Adapt7 f t1 r1 t2 r2 t3 r3 t4 r4 t5 r5 t6 r6 t7 = Adapt f t1 r1 -> t1 -> Adapt6 r1 t2 r2 t3 r3 t4 r4 t5 r5 t6 r6 t7
92type Adapt8 f t1 r1 t2 r2 t3 r3 t4 r4 t5 r5 t6 r6 t7 r7 t8 = Adapt f t1 r1 -> t1 -> Adapt7 r1 t2 r2 t3 r3 t4 r4 t5 r5 t6 r6 t7 r7 t8
93type Adapt9 f t1 r1 t2 r2 t3 r3 t4 r4 t5 r5 t6 r6 t7 r7 t8 r8 t9 = Adapt f t1 r1 -> t1 -> Adapt8 r1 t2 r2 t3 r3 t4 r4 t5 r5 t6 r6 t7 r7 t8 r8 t9
94type Adapt10 f t1 r1 t2 r2 t3 r3 t4 r4 t5 r5 t6 r6 t7 r7 t8 r8 t9 r9 t10 = Adapt f t1 r1 -> t1 -> Adapt9 r1 t2 r2 t3 r3 t4 r4 t5 r5 t6 r6 t7 r7 t8 r8 t9 r9 t10
95
96app1 :: f -> Adapt1 f t1
97app2 :: f -> Adapt2 f t1 r1 t2
98app3 :: f -> Adapt3 f t1 r1 t2 r2 t3
99app4 :: f -> Adapt4 f t1 r1 t2 r2 t3 r3 t4
100app5 :: f -> Adapt5 f t1 r1 t2 r2 t3 r3 t4 r4 t5
101app6 :: f -> Adapt6 f t1 r1 t2 r2 t3 r3 t4 r4 t5 r5 t6
102app7 :: f -> Adapt7 f t1 r1 t2 r2 t3 r3 t4 r4 t5 r5 t6 r6 t7
103app8 :: f -> Adapt8 f t1 r1 t2 r2 t3 r3 t4 r4 t5 r5 t6 r6 t7 r7 t8
104app9 :: f -> Adapt9 f t1 r1 t2 r2 t3 r3 t4 r4 t5 r5 t6 r6 t7 r7 t8 r8 t9
105app10 :: f -> Adapt10 f t1 r1 t2 r2 t3 r3 t4 r4 t5 r5 t6 r6 t7 r7 t8 r8 t9 r9 t10
106
107app1 f w1 o1 s = w1 o1 $ \a1 -> f // a1 // check s
108app2 f w1 o1 w2 o2 s = ww2 w1 o1 w2 o2 $ \a1 a2 -> f // a1 // a2 // check s
109app3 f w1 o1 w2 o2 w3 o3 s = ww3 w1 o1 w2 o2 w3 o3 $
110 \a1 a2 a3 -> f // a1 // a2 // a3 // check s
111app4 f w1 o1 w2 o2 w3 o3 w4 o4 s = ww4 w1 o1 w2 o2 w3 o3 w4 o4 $
112 \a1 a2 a3 a4 -> f // a1 // a2 // a3 // a4 // check s
113app5 f w1 o1 w2 o2 w3 o3 w4 o4 w5 o5 s = ww5 w1 o1 w2 o2 w3 o3 w4 o4 w5 o5 $
114 \a1 a2 a3 a4 a5 -> f // a1 // a2 // a3 // a4 // a5 // check s
115app6 f w1 o1 w2 o2 w3 o3 w4 o4 w5 o5 w6 o6 s = ww6 w1 o1 w2 o2 w3 o3 w4 o4 w5 o5 w6 o6 $
116 \a1 a2 a3 a4 a5 a6 -> f // a1 // a2 // a3 // a4 // a5 // a6 // check s
117app7 f w1 o1 w2 o2 w3 o3 w4 o4 w5 o5 w6 o6 w7 o7 s = ww7 w1 o1 w2 o2 w3 o3 w4 o4 w5 o5 w6 o6 w7 o7 $
118 \a1 a2 a3 a4 a5 a6 a7 -> f // a1 // a2 // a3 // a4 // a5 // a6 // a7 // check s
119app8 f w1 o1 w2 o2 w3 o3 w4 o4 w5 o5 w6 o6 w7 o7 w8 o8 s = ww8 w1 o1 w2 o2 w3 o3 w4 o4 w5 o5 w6 o6 w7 o7 w8 o8 $
120 \a1 a2 a3 a4 a5 a6 a7 a8 -> f // a1 // a2 // a3 // a4 // a5 // a6 // a7 // a8 // check s
121app9 f w1 o1 w2 o2 w3 o3 w4 o4 w5 o5 w6 o6 w7 o7 w8 o8 w9 o9 s = ww9 w1 o1 w2 o2 w3 o3 w4 o4 w5 o5 w6 o6 w7 o7 w8 o8 w9 o9 $
122 \a1 a2 a3 a4 a5 a6 a7 a8 a9 -> f // a1 // a2 // a3 // a4 // a5 // a6 // a7 // a8 // a9 // check s
123app10 f w1 o1 w2 o2 w3 o3 w4 o4 w5 o5 w6 o6 w7 o7 w8 o8 w9 o9 w10 o10 s = ww10 w1 o1 w2 o2 w3 o3 w4 o4 w5 o5 w6 o6 w7 o7 w8 o8 w9 o9 w10 o10 $
124 \a1 a2 a3 a4 a5 a6 a7 a8 a9 a10 -> f // a1 // a2 // a3 // a4 // a5 // a6 // a7 // a8 // a9 // a10 // check s
125
126
127
128-- GSL error codes are <= 1024
129-- | error codes for the auxiliary functions required by the wrappers
130errorCode :: CInt -> String
131errorCode 2000 = "bad size"
132errorCode 2001 = "bad function code"
133errorCode 2002 = "memory problem"
134errorCode 2003 = "bad file"
135errorCode 2004 = "singular"
136errorCode 2005 = "didn't converge"
137errorCode 2006 = "the input matrix is not positive definite"
138errorCode 2007 = "not yet supported in this OS"
139errorCode n = "code "++show n
140
141
142-- | clear the fpu
143foreign import ccall unsafe "asm_finit" finit :: IO ()
144
145-- | check the error code
146check :: String -> IO CInt -> IO ()
147check msg f = do
148#if FINIT
149 finit
150#endif
151 err <- f
152 when (err/=0) $ error (msg++": "++errorCode err)
153 return ()
154
155-- | Error capture and conversion to Maybe
156mbCatch :: IO x -> IO (Maybe x)
157mbCatch act = E.catch (Just `fmap` act) f
158 where f :: SomeException -> IO (Maybe x)
159 f _ = return Nothing
160